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Latorzeff I, Camps-Maléa A, Supiot S, de Crevoisier R, Farcy-Jacquet MP, Hannoun-Lévi JM, Riou O, Pommier P, Artignan X, Chapet O, Créhange G, Marchesi V, Pasquier D, Sargos P. Indication and perspectives of radiation therapy in the setting of de-novo metastatic prostate cancer. Cancer Radiother 2024; 28:49-55. [PMID: 37827959 DOI: 10.1016/j.canrad.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 05/09/2023] [Indexed: 10/14/2023]
Abstract
Prostate cancer is the most common cancer and the third leading cause of cancer mortality in men. Each year, approximately 10% of prostate cancers are diagnosed metastatic at initial presentation. The standard treatment option for de-novo metastatic prostate cancer is androgen deprivation therapy with novel hormonal agent or with chemotherapy. Recently, PEACE-1 trial highlighted the benefit of triplet therapy resulting in the combination of androgen deprivation therapy combined with docetaxel and abiraterone. Radiotherapy can be proposed in a curative intent or to treat local symptomatic disease. Nowadays, radiotherapy of the primary disease is only recommended for de novo low-burden/low-volume metastatic prostate cancer, as defined in the CHAARTED criteria. However, studies on stereotactic radiotherapy on oligometastases have shown that this therapeutic approach is feasible and well tolerated. Prospective research currently focuses on the benefit of intensification by combining treatment of the metastatic sites and the primary all together. The contribution of metabolic imaging to better define the target volumes and specify the oligometastatic character allows a better selection of patients. This article aims to define indications of radiotherapy and perspectives of this therapeutic option for de-novo metastatic prostate cancer.
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Affiliation(s)
- I Latorzeff
- Department of Radiation Oncology, clinique Pasteur, Toulouse, France.
| | - A Camps-Maléa
- Department of Radiation Oncology, hôpital Bretonneau, CHU de Tours, Tours, France
| | - S Supiot
- Department of Radiation Oncology, institut de cancérologie de l'Ouest centre René-Gauducheau, Saint-Herblain, France; CNRS, Nantes, France; Université de Nantes, Nantes, France
| | - R de Crevoisier
- Department of Radiation Oncology, centre Eugène-Marquis, Rennes, France
| | - M-P Farcy-Jacquet
- Fédération universitaire d'oncologie radiothérapie, institut de cancérologie du Gard, CHU de Nîmes, Nîmes, France
| | - J-M Hannoun-Lévi
- Department of Radiation Oncology, centre Antoine-Lacassagne, Nice, France
| | - O Riou
- Department of Radiation Oncology, institut du cancer de Montpellier, Montpellier, France; Fédération universitaire d'oncologie radiothérapie de Méditerranée Occitanie, université de Montpellier, Montpellier, France; U1194, Inserm, Montpellier, France; IRCM, Montpellier, France
| | - P Pommier
- Department of Radiation Oncology, institut de cancérologie de l'Ouest, Angers, France
| | - X Artignan
- Department of Radiation Oncology, centre hospitalier privé Saint-Grégoire, Rennes, France
| | - O Chapet
- Department of Radiation Oncology, centre hospitalier Lyon Sud, Pierre-Bénite, France
| | - G Créhange
- Department of Radiation Oncology, institut Curie, Saint-Cloud, France
| | - V Marchesi
- Department of Medical Physics, centre Alexis-Vautrin, Vandœuvre-lès-Nancy, France
| | - D Pasquier
- Academic Department of Radiation Oncology, centre Oscar-Lambret, Lille, France; UMR 9189 - CRIStAL, université de Lille, CNRS, école Centrale Lille, 59000 Lille, France
| | - P Sargos
- Department of Radiotherapy, institut Bergonié, Bordeaux, France
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2
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Baboudjian M, Roubaud G, Fromont G, Gauthé M, Beauval JB, Barret E, Brureau L, Créhange G, Dariane C, Fiard G, Mathieu R, Ruffion A, Rouprêt M, Renard-Penna R, Sargos P, Ploussard G. What is the ideal combination therapy in de novo, oligometastatic, castration-sensitive prostate cancer? World J Urol 2023; 41:2033-2041. [PMID: 36484817 DOI: 10.1007/s00345-022-04239-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/28/2022] [Indexed: 12/13/2022] Open
Abstract
PURPOSE To review current evidence regarding the management of de novo, oligometastatic, castration-sensitive prostate cancer (PCa). METHODS A literature search was conducted on PubMed/Medline and a narrative synthesis of the evidence was performed in August 2022. RESULTS Oligometastatic disease is an intermediate state between localized and aggressive metastatic PCa defined by ≤ 3-5 metastatic lesions, although this definition remains controversial. Conventional imaging has limited accuracy in detecting metastatic lesions, and the implementation of molecular imaging could pave the way for a more personalized treatment strategy. However, oncological data supporting this strategy are needed. Radiotherapy to the primary tumor should be considered standard treatment for oligometastatic PCa (omPCa). However, it remains to be seen whether local therapy still has an additional survival benefit in patients with de novo omPCa when treated with the most modern systemic therapy combinations. There is insufficient evidence to recommend cytoreductive radical prostatectomy as local therapy; or stereotactic body radiotherapy as metastasis-directed therapy in patients with omPCa. Current data support the use of intensified systemic therapy with androgen deprivation therapy (ADT) and next-generation hormone therapies (NHT) for patients with de novo omPCa. Docetaxel has not demonstrated benefit in low volume disease. There are insufficient data to support the use of triple therapy (i.e., ADT + NHT + Docetaxel) in low volume disease. CONCLUSION The present review discusses current data in de novo, omPCa regarding its definition, the increasing role of molecular imaging, the place of local and metastasis-directed therapies, and the intensification of systemic therapies.
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Affiliation(s)
- Michael Baboudjian
- Department of Urology, APHM, North Academic Hospital, Marseille, France.
- Department of Urology, APHM, La Conception Hospital, Marseille, France.
- Department of Urology, Fundació Puigvert, Autonoma University of Barcelona, Barcelona, Spain.
- Department of Urology, La Croix du Sud Hôpital, Quint Fonsegrives, France.
| | - Guilhem Roubaud
- Department of Medical Oncology, Institut Bergonié, 33000, Bordeaux, France
| | | | - Mathieu Gauthé
- Department of Nuclear Medicine, Scintep-Institut Daniel Hollard, Grenoble, France
| | | | - Eric Barret
- Department of Urology, Institut Mutualiste Montsouris, Paris, France
| | - Laurent Brureau
- Department of Urology, CHU de Pointe-à-Pitre, University of Antilles, University of Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, 97110, Pointe-à-Pitre, France
| | | | - Charles Dariane
- Department of Urology, Hôpital Européen Georges-Pompidou, APHP, Paris-Paris University-U1151 Inserm-INEM, Necker, Paris, France
| | - Gaëlle Fiard
- Department of Urology, Grenoble Alpes University Hospital, Université Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
| | | | - Alain Ruffion
- Service d'urologie Centre Hospitalier Lyon Sud, Hospices Civils de Lyon, Lyon, France
- Equipe 2-Centre d'Innovation en Cancérologie de Lyon (EA 3738 CICLY)-Faculté de Médecine Lyon Sud-Université Lyon 1, Lyon, France
| | - Morgan Rouprêt
- Sorbonne University, GRC 5 Predictive Onco-Uro, AP-HP, Urology, Pitie-Salpetriere Hospital, 75013, Paris, France
| | - Raphaële Renard-Penna
- Sorbonne University, AP-HP, Radiology, Pitie-Salpetriere Hospital, 75013, Paris, France
| | - Paul Sargos
- Department of Radiotherapy, Institut Bergonié, 33000, Bordeaux, France
| | - Guillaume Ploussard
- Department of Urology, La Croix du Sud Hôpital, Quint Fonsegrives, France
- Department of Urology, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
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3
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Sánchez-Iglesias ÁL, Morillo-Macías V, Santafé-Jiménez A, Ferrer-Albiach C. Bone-only oligometastatic prostate cancer: can SABR improve outcomes? A single-center experience. Radiat Oncol J 2022; 40:192-199. [PMID: 36200308 PMCID: PMC9535412 DOI: 10.3857/roj.2022.00101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Purpose Ablative treatment of oligometastases has shown survival benefit with certain tumors, although these effects still are to be demonstrated in prostate cancer. Materials and Methods We analysed the toxicity and clinical control results obtained in patients with bone-only oligometastatic prostate cancer treated with stereotactic ablative radiotherapy (SABR). Retrospective study on patients with metachronous oligoprogression and synchronous de novo bone-only oligometastatic prostate cancer treated with SABR and androgen deprivation therapy. Results Treatment schedules varied according to location and organs at risk, with biologically equivalent dose (BED) ≥100 Gy. Fifty-five bone lesions (31 patients) were treated and evaluated for toxicity, local control, progression-free survival (PFS), and overall survival (OS). After a 41-month follow-up, there was minimal acute or chronic toxicity and no G3 toxicity. The local control at 3 and 5 years was 100% and 87.1%, respectively. Median PFS and OS were 43 and 98 months, respectively. The best result in PFS was obtained with BED ≥230 Gy, delaying time to the next systemic therapy by 28.5 months. Conclusion The use of SABR in bone oligometastases of prostate cancer is safe with minimal toxicity and excellent results in local control and PFS, delaying the start of the next systemic therapy.
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Affiliation(s)
- Ángel L. Sánchez-Iglesias
- Department of Radiation Oncology, Consorcio Hospitalario Provincial de Castellón, Spain
- Correspondence: Ángel L. Sánchez-Iglesias Department of Radiation Oncology, Consorcio Hospitalario Provincial de Castellón, Avda. Dr. Clará 19, 12002 Castellón, Spain. Tel: +34-964-376000 Fax: +34-964-354401 E-mail:
| | | | - Ana Santafé-Jiménez
- Department of Radiation Oncology, Consorcio Hospitalario Provincial de Castellón, Spain
| | - Carlos Ferrer-Albiach
- Department of Radiation Oncology, Consorcio Hospitalario Provincial de Castellón, Spain
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Yaney A, Stevens A, Monk P, Martin D, Diaz DA, Wang SJ. Radiotherapy in Oligometastatic, Oligorecurrent and Oligoprogressive Prostate Cancer: A Mini-Review. Front Oncol 2022; 12:932637. [PMID: 35756663 PMCID: PMC9213742 DOI: 10.3389/fonc.2022.932637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 05/23/2022] [Indexed: 12/25/2022] Open
Abstract
Globally, prostate cancer is one of the most common malignancies affecting men. With the advent of advanced molecular imaging, an increasing number of men are found to have oligometastatic disease (OD) either at primary diagnosis or at the time of biochemical failure. No strict definition exists for OD, with historical and ongoing studies utilizing diverse criteria. There is mounting evidence from many different malignancies that patients with OD have improved outcomes compared to their widely metastatic counterparts. As such, treatment intensification of those with OD or oligoprogressive disease has become an area of intense interest and study. This article will review the biology, evidence and controversy behind the treatment of de novo oligometastatic, oligorecurrent and oligoprogressive prostate cancer.
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Affiliation(s)
- Alexander Yaney
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Andrew Stevens
- College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Paul Monk
- Medical Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Douglas Martin
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Dayssy A Diaz
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Shang-Jui Wang
- Department of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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Yang G, Xie J, Zhang S, Gu W, Yuan J, Wang R, Guo C, Ye L, Peng B, Yao X, Yang B. Clinical Significance of Mesenchymal Circulating Tumor Cells in Patients With Oligometastatic Hormone-Sensitive Prostate Cancer Who Underwent Cytoreductive Radical Prostatectomy. Front Oncol 2022; 11:812549. [PMID: 35127528 PMCID: PMC8810514 DOI: 10.3389/fonc.2021.812549] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/15/2021] [Indexed: 12/30/2022] Open
Abstract
PurposeGrowing evidence shows that circulating tumor cells (CTCs) become more aggressive after the epithelial–mesenchymal transition (EMT), though the clinical significance of CTCs undergoing EMT in oligometastatic hormone-sensitive prostate cancer (omHSPC) patients has not yet been reported. Accordingly, the aim of this study was to detect the CTC level and investigate the clinical significance of mesenchymal CTCs in omHSPC patients who underwent cytoreductive radical prostatectomy (CRP).Materials and MethodsBlood samples were drawn from 54 omHSPC patients who underwent CRP. The CanPatrol CTC enrichment technique was applied to isolate and identify different phenotypes of CTCs, which were classified as epithelial (E-CTCs), mesenchymal (M-CTCs), or biphenotypic epithelial/mesenchymal (Bi-CTCs). Univariable and multivariable Cox regression analyses were employed to investigate potential prognostic factors for metastatic castration-resistant prostate cancer (mCRPC)-free survival and cancer-specific survival (CSS). The prognostic value of CTCs for CSS and mCRPC-free survival was assessed using time-dependent receiver operating characteristic (ROC) curves and Kaplan–Meier analysis.ResultsCTCs were detected in 51 of 54 patients (94%). E-CTC, M-CTC, and Bi-CTC detection rates were 56%, 67%, and 85%, respectively. A positive correlation was found between the M-CTC count and number of bone metastases (p = 0.012). Time-dependent ROC analysis showed that the M-CTC count had higher predictive power than E-CTC or Bi-CTC for mCRPC-free survival (3-year area under the curve [AUC] values: 0.64, 0.60, and 0.61) and CSS (3-year AUC: 0.86, 0.58, and 0.67). Additionally, time-dependent ROC analysis revealed total CTCs (T-CTCs) ≥5 and M-CTCs ≥2 to be the cutoff points with optimal specificity and sensitivity. Based on multivariable Cox regression, T-CTC and M-CTC counts were both independently associated with CSS and mCRPC-free survival (all p < 0.05), though E-CTCs and Bi-CTCs had no significant prognostic value (all p > 0.05). Patients with T-CTC ≥5 or M-CTC ≥2 had significantly worse mCRPC-free survival and CSS than those with T-CTC<5 or M-CTC<2 (all p < 0.05) after CRP.ConclusionCTC quantification and phenotype characterization provide prognostic information, and M-CTCs can be used as a novel biomarker for omHSPC patients who undergo CRP. The results need to be validated in prospective studies.
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Affiliation(s)
- Guanjie Yang
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jun Xie
- Shanghai Clinical College, Anhui Medical University, Shanghai, China
| | - Shun Zhang
- Department of Urology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Wenyu Gu
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jing Yuan
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ruiliang Wang
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Changcheng Guo
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lin Ye
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Bo Peng
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
- Shanghai Clinical College, Anhui Medical University, Shanghai, China
| | - Xudong Yao
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
- Shanghai Clinical College, Anhui Medical University, Shanghai, China
- *Correspondence: Xudong Yao, ; Bin Yang,
| | - Bin Yang
- Department of Urology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
- *Correspondence: Xudong Yao, ; Bin Yang,
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Montero A, Hernando O, Cañon V, Guevara D, Valero J, Chen-Zhao X, Garcia-Acilu P, Sanchez E, Lopez M, Ciervide R, Garcia-Aranda M, Alvarez B, Prado A, Alonso R, Fernandez-Leton P, Rubio C. Radiation therapy with curative intention in men with de novo metastatic prostate carcinoma: shoot'em all! Rep Pract Oncol Radiother 2021; 26:605-615. [PMID: 34434577 PMCID: PMC8382082 DOI: 10.5603/rpor.a2021.0077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/27/2021] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND About 5% of prostate cancer cases are metastatic at diagnoses. Radiotherapy of both primary tumor and secondary lesions can be, in addition to systemic treatments, a radical alternative for selected patients. MATERIALS AND METHODS Patients with de novo prostate carcinoma with bone or lymph node metastases were retrospectively reviewed. All patients received moderate hypofractionated IMRT/VMAT up to 63 Gy in 21 daily fractions of 3 Gy to prostate and metastases with neoadjuvant and concurrent androgen deprivation therapy (ADT). According to known advances some patients also received abiraterone, enzalutamide, or docetaxel. RESULTS Between 2015-2020, we attended 26 prostate cancer patients (median age 69.5 years, range 52-84) with simultaneous oligometastases [mean 2.1 metastases, median 1.5 metastases (range 1-6)]. Eighteen patients (69%) presented lymph node metastases, 4 (15.5%) bone metastases and 4 (15.5%) both lymph node and bone metastases. With a median follow-up of 15.5 months (range 3-65 months), 16 patients (62%) are alive and tumor free while 10 (38%) are alive with tumor. Four patients (17%) developed tumor progression, out of irradiated area in all cases, with a median time to progression of 43.5 months (range 27-56 months). Actuarial progression-free survival (PFS) rates at 12 and 24 months were 94.1% and 84.7%, respectively. No grade > 2 acute or late complications were recorded. CONCLUSIONS Simultaneous directed radical hypofractionated radiation therapy for prostate and metastases is feasible, well tolerated and achieves an acceptable PFS rate. However, further studies with longer follow-up are necessary to definitively address these observations.
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Affiliation(s)
- Angel Montero
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Ovidio Hernando
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Veronica Cañon
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Diana Guevara
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Jeannete Valero
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Xin Chen-Zhao
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | | | - Emilio Sanchez
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Mercedes Lopez
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | - Raquel Ciervide
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | | | - Beatriz Alvarez
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | | | - Rosa Alonso
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
| | | | - Carmen Rubio
- Department of Radiation Oncology, HM Hospitales, Madrid, Spain
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Rogowski P, Roach M, Schmidt-Hegemann NS, Trapp C, von Bestenbostel R, Shi R, Buchner A, Stief C, Belka C, Li M. Radiotherapy of oligometastatic prostate cancer: a systematic review. Radiat Oncol 2021; 16:50. [PMID: 33750437 PMCID: PMC7941976 DOI: 10.1186/s13014-021-01776-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 02/24/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Due to improved imaging sensitivity, the term "oligometastatic" prostate cancer disease is diagnosed more often, leading to an increasing interest in metastasis-directed therapy (MDT). There are two types of radiation based MDT applied when treating oligometastatic disease: (1) stereotactic body radiation therapy (SBRT) generally used for bone metastases; or (2) SBRT for isolated nodal oligometastases combined with prophylactic elective nodal radiotherapy. This review aims to summarize current evidence data, which may shed light on the optimal management of this heterogeneous group of patients. METHODS A systematic review of the Medline database through PubMed was performed according to PRISMA guidelines. All relevant studies published up to November 2020 were identified and screened. Fifty-six titles were included. Besides outcome parameters, different prognostic and predictive factors were assessed, including site of metastases, time between primary treatment and MDT, use of systemic therapies, hormone sensitivity, as well as pattern of recurrence. FINDINGS Evidence consists largely of retrospective case series and no consistent precise definition of oligometastasis exists, however, most investigators seem to acknowledge the need to distinguish between patients presenting with what is frequently called "synchronous" versus "metachronous" oligometastatic disease. Available data on radiotherapy as MDT demonstrate high local control rates and a small but relevant proportion of patients without progressive disease after 2 years. This holds true for both hormone sensitive and castration resistant prostate cancer diseases. The use of 68Ga-PSMA PET/CT for staging increased dramatically. Radiation doses and field sizes varied considerably among the studies. The search for relevant prognostic and predictive factors is ongoing. CONCLUSIONS To our best knowledge this review on oligometastatic prostate cancer included the largest number of original articles. It demonstrates the therapeutic potential and challenges of MDT for oligometastatic prostate cancer. Prospective studies are under way and will provide further high-level evidence.
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Affiliation(s)
- Paul Rogowski
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Mack Roach
- Department of Radiation Oncology, UCSF Helen Diller Family Comprehensive Cancer Center, 1600 Divisadero Street, Suite H 1031, San Francisco, CA 94143-1708 USA
| | | | - Christian Trapp
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Rieke von Bestenbostel
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Run Shi
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Alexander Buchner
- Department of Urology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Christian Stief
- Department of Urology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Claus Belka
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
- German Cancer Consortium (DKTK), Munich, Germany
| | - Minglun Li
- Department of Radiation Oncology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
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